6bd756d7c6
PR-URL: https://github.com/nodejs/node/pull/44741 Fixes: https://github.com/nodejs/node/issues/44650 Fixes: https://github.com/nodejs/node/issues/37472 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
32 lines
699 B
JavaScript
32 lines
699 B
JavaScript
// Copyright 2020 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//
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// Flags: --allow-natives-syntax --turbofan
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const xs = [1,2,3,4,5,6,7,8,9];
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let deopt = false;
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function g(acc, x, i) {
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if (deopt) {
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assertFalse(%IsBeingInterpreted());
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Array.prototype.x = 42; // Trigger a lazy deopt.
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deopt = false;
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}
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return acc + x;
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}
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function f() {
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return xs.reduce(g, 0);
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}
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%PrepareFunctionForOptimization(f);
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%PrepareFunctionForOptimization(g);
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assertEquals(45, f());
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assertEquals(45, f());
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%OptimizeFunctionOnNextCall(f);
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deopt = true;
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assertEquals(45, f());
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assertEquals(45, f());
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